1 /*
2 * Copyright 2010 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8
9 #include "SkPDFFormXObject.h"
10 #include "SkPDFUtils.h"
11
SkPDFMakeFormXObject(std::unique_ptr<SkStreamAsset> content,sk_sp<SkPDFArray> mediaBox,sk_sp<SkPDFDict> resourceDict,const SkMatrix & inverseTransform,const char * colorSpace)12 sk_sp<SkPDFObject> SkPDFMakeFormXObject(std::unique_ptr<SkStreamAsset> content,
13 sk_sp<SkPDFArray> mediaBox,
14 sk_sp<SkPDFDict> resourceDict,
15 const SkMatrix& inverseTransform,
16 const char* colorSpace) {
17 auto form = sk_make_sp<SkPDFStream>(std::move(content));
18 form->dict()->insertName("Type", "XObject");
19 form->dict()->insertName("Subtype", "Form");
20 if (!inverseTransform.isIdentity()) {
21 sk_sp<SkPDFObject> mat(SkPDFUtils::MatrixToArray(inverseTransform));
22 form->dict()->insertObject("Matrix", std::move(mat));
23 }
24 form->dict()->insertObject("Resources", std::move(resourceDict));
25 form->dict()->insertObject("BBox", std::move(mediaBox));
26
27 // Right now FormXObject is only used for saveLayer, which implies
28 // isolated blending. Do this conditionally if that changes.
29 // TODO(halcanary): Is this comment obsolete, since we use it for
30 // alpha masks?
31 auto group = sk_make_sp<SkPDFDict>("Group");
32 group->insertName("S", "Transparency");
33 if (colorSpace != nullptr) {
34 group->insertName("CS", colorSpace);
35 }
36 group->insertBool("I", true); // Isolated.
37 form->dict()->insertObject("Group", std::move(group));
38 return form;
39 }
40